| Value | Category | Cases | |
|---|---|---|---|
| 0 | 303 |
68.9%
|
|
| 1 | 15 |
3.4%
|
|
| 2 | 12 |
2.7%
|
|
| 3 | 5 |
1.1%
|
|
| 4 | 8 |
1.8%
|
|
| 5 | 11 |
2.5%
|
|
| 6 | 3 |
0.7%
|
|
| 7 | 1 |
0.2%
|
|
| 8 | 3 |
0.7%
|
|
| 9 | 1 |
0.2%
|
|
| 10 | 14 |
3.2%
|
|
| 12 | 1 |
0.2%
|
|
| 15 | 8 |
1.8%
|
|
| 18 | 2 |
0.5%
|
|
| 20 | 17 |
3.9%
|
|
| 21 | 1 |
0.2%
|
|
| 25 | 1 |
0.2%
|
|
| 40 | 2 |
0.5%
|
|
| 77 | Don't know | 32 |
7.3%
|
| Sysmiss | 1608 |